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    <title>Document</title>
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<body>
    <script>
        console.log(Object.prototype);
        //Object{}
        var o = new Object();
        console.log(o.prototype);  //undefined
        console.log(Array.prototype);
        //[Symbol(Symbol.unscopables): Object]
        console.log(Function.prototype);
        //function(){}
        function hello() {
            console.log("hello");
        }
        hello.prototype = "hello world";
        console.log(hello.prototype);

    </script>
</body>

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